Optimización del diseño de estructuras conformadas por pórticos de acero resistentes a momentos y amortiguadores de masa sintonizada (TMD)

Conventional design methods for earthquake-resistant structures are based on the structure’s resistance, stiffness, and ductility in the inelastic range. Recent advances in the area seek to engender new methodologies based on seismic energy dissipation through external devices to reduce the damage that may occur in the structural elements after an earthquake. This article proposes a method to optimize the design of moment-resisting steel frames equipped with tuned mass dampers. The objective is to reduce deformations, structural damage, non-structural damage, and the cost of the structure. In the optimization process, a heuristic criterion was used based on the theory of evolution of populations called the differential evolution algorithm, modified by adding two features to improve its performance. First, the mutation and crossing parameters were provided with self-adaptation. Then, the algorithm was given multimodal characteristics to help it find the global optimum. Finally, we observed that the solution quality and algorithm convergence were good using the optimization method in the various study cases. Furthermore, there was an improvement in optimization quality due to the added features of multimodal functions and self-adaptive parameters, expanding the algorithm for exploration and exploitation.